package Thread;

public class Demo13 {
    private static volatile int count = 0;
    private static Object locker = new Object();

//    public static void main(String[] args) throws InterruptedException {
//        Thread t1 = new Thread(() -> {
//            for (int i = 0; i < 50000; i++) {
//                synchronized (locker){
//                    count++;
//                }
//            }
//        });
//
//        Thread t2 = new Thread(() -> {
//            for (int i = 0; i < 50000; i++) {
//                synchronized (locker){
//                    count++;
//                }
//            }
//        });
//        t1.start();
//        t2.start();
//        t1.join();
//        t2.join();
//        System.out.println("count = " + count);
//    }

    public static void main(String[] args) throws InterruptedException {
        Thread t1 = new Thread(() -> {
            synchronized (locker){
                for (int i = 0; i < 50000; i++) {
                    count++;
                }
            }
        });

        Thread t2 = new Thread(() -> {
            synchronized (locker){
                for (int i = 0; i < 50000; i++) {
                    count++;
                }
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println("count = " + count);
    }
}
